09-02-2014
• ars technica
.... One of the primary ways that stingrays operate is by taking advantage of a design feature in any phone available today. When 3G or 4G networks are unavailable, the handset will drop down to the older 2G network. While normally that works as a nice last-resort backup to provide service, 2G networks are notoriously insecure. Handsets operating on 2G will readily accept communication from another device purporting to be a valid cell tower, like a stingray. So the stingray takes advantage of this feature by jamming the 3G and 4G signals, forcing the phone to use a 2G signal....